Finding the Fourth Proportional to 2,180.90, 3,009.41 and 1,296.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.90 : 3,009.41 = 1,296.58 : x
2. Step 2: Convert to fraction form
   2,180.90/3,009.41 = 1,296.58/x
3. Step 3: Cross multiply
   2,180.90x = 3,009.41 × 1,296.58
4. Step 4: Simplify right side
   2,180.90x = 3,901,940.82
5. Step 5: Solve for x
   x = 3,901,940.82/2,180.90
6. Step 6: Final answer
   x = 1,789.14